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      Magnetic nanoparticle-based therapeutic agents for thermo-chemotherapy treatment of cancer

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          Abstract

          Magnetic nanoparticles have great potential as mediators of localised heat as well as vehicles for drug delivery to have synergistic effect of thermo-chemotherapy for cancer treatment.

          Abstract

          Magnetic nanoparticles have been widely investigated for their great potential as mediators of heat for localised hyperthermia therapy. Nanocarriers have also attracted increasing attention due to the possibility of delivering drugs at specific locations, therefore limiting systematic effects. The enhancement of the anti-cancer effect of chemotherapy with application of concurrent hyperthermia was noticed more than thirty years ago. However, combining magnetic nanoparticles with molecules of drugs in the same nanoformulation has only recently emerged as a promising tool for the application of hyperthermia with combined chemotherapy in the treatment of cancer. The main feature of this review is to present the recent advances in the development of multifunctional therapeutic nanosystems incorporating both magnetic nanoparticles and drugs, and their superior efficacy in treating cancer compared to either hyperthermia or chemotherapy as standalone therapies. The principle of magnetic fluid hyperthermia is also presented.

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          Most cited references173

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          Tumor vascular permeability and the EPR effect in macromolecular therapeutics: a review

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            Heating magnetic fluid with alternating magnetic field

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              The EPR effect: Unique features of tumor blood vessels for drug delivery, factors involved, and limitations and augmentation of the effect.

              The enhanced permeability and retention (EPR) effect is a unique phenomenon of solid tumors related to their anatomical and pathophysiological differences from normal tissues. For example, angiogenesis leads to high vascular density in solid tumors, large gaps exist between endothelial cells in tumor blood vessels, and tumor tissues show selective extravasation and retention of macromolecular drugs. This EPR effect served as a basis for development of macromolecular anticancer therapy. We demonstrated methods to enhance this effect artificially in clinical settings. Of great importance was increasing systolic blood pressure via slow angiotensin II infusion. Another strategy involved utilization of NO-releasing agents such as topical nitroglycerin, which releases nitrite. Nitrite is converted to NO more selectively in the tumor tissues, which leads to a significantly increased EPR effect and enhanced antitumor drug effects as well. This review discusses molecular mechanisms of factors related to the EPR effect, the unique anatomy of tumor vessels, limitations and techniques to avoid such limitations, augmenting tumor drug delivery, and experimental and clinical findings. Copyright © 2010 Elsevier B.V. All rights reserved.
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                Author and article information

                Journal
                NANOHL
                Nanoscale
                Nanoscale
                Royal Society of Chemistry (RSC)
                2040-3364
                2040-3372
                2014
                2014
                : 6
                : 20
                : 11553-11573
                Affiliations
                [1 ]UCL Healthcare Biomagnetic and Nanomaterials Laboratories
                [2 ]London W1S 4BS, UK
                [3 ]Department of Physics and Astronomy
                [4 ]University College London
                [5 ]London WC1E 6BT, UK
                Article
                10.1039/C4NR03482A
                25212238
                c3796be6-f902-4c4e-850c-acb20dde7117
                © 2014
                History

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